12v Batteries

Lead acid cell batteries are the oldest and by far, the most common type of 12v battery on the market. Although they’re not used for appliances such as consumer electronics whereas smaller types of batteries are required. Due to their extremely high discharge capacity, this makes them the most types of battery for popular for larger-scaled applications, such as vehicle start-ups and emergency power generators.

Lead acid batteries normally fall into two categories: Sealed and Vented. The vented type of battery allow gas particles to escape without any pressure build-up. This makes them less susceptible to issues caused by high-ambient temperatures and overcharging that can occur within other battery types. Sealed batteries on the other hand are used in applications where vented batteries cannot be used, either due to a lack air ventilation or the mounting position cannot be accessed. They’re also much more compact, this allows them to be used in some applications and devices where it just isn’t possible to place a vented battery. Vented batteries must be mounted in such a way that the battery is always upright to prevent the acid from leaking, whereas sealed lead-acid batteries can be hooked to up pretty much anything given their robust nature.

Sealed Lead-Acid 12V Battery Design

All 12v lead-acid batteries consist of a number of lead plate shields that are separated by spacers and are submerged in diluted Sulfuric acid. The negative and positive plates are put together from different lead alloys, these create an ionic charge that allows the 12v batteries to function.

The surface of the plate shields react with the acid, producing a strong electrical charge. Therefore, most batteries are designed with one thing in mind, to create the maximum possible surface area for the best electrical charges. The plates are small and thin, allowing more of them to fit into the same volume surface area. High-capacity batteries have a lot more plates than lower-capacity ones, this increases the total surface area that comes into contact with the battery acid.

While a higher surface area does provide a higher current output, it can be susceptible to damage by the deep cycling process. Deep cycling occurs when the battery is discharged to below its voltage capacity. For 12v batteries, this occurs when the battery’s voltage drops below 10.2 volts.

Deep cycle batteries are designed to use in various applications where deep cycling is featured. These battery types have much heavier plates that are designed to withstand the deep cycling process without any damaging affects. However, they have a much lower peaking current than most lead-acid batteries, such as the best automotive batteries. These are commonly used in electric cars and other vehicles, such as forklifts trucks, photo-voltaic power systems (solar operated devices), and electric wheelchairs and scooters.

Lead-Acid 12v Battery Voltage

12 volt lead acid batteries always produce a voltage of 2 volts per intregrated cell. Accordingly, a 12v battery will always have six cells, hence the name 12 volt battery.

Please see below for our best selection of 12v batteries